– English Lyrics

Lyrics & Translation

[English]

Who thinks that gassing up your car with

corn ethanol is better for the

environment than gasoline? Come on, show

me your hands. Any ethanol supporters

here? I mean, it's made from corn, so it

should be better, right? Well, here's

the catch. When you factor in the

environmental cost of converting land to

grow all that corn, ethanol can actually

generate 25% more carbon emissions than

gasoline. Turning more lands into

cornfields has side effects. Like

clearing forests, disrupting soils, and

using tons of fertilizer, all of which

add to emissions. And there is more. The

push for ethanol can drive up corn

prices, making food like cornmeal or

even popcorn more expensive.

So, while ethanol sounds green, the

reality is much more complicated.

I am a sustainability researcher

passionate about uncovering the real

environmental impacts of the products

and technologies shaping our lives and

our future.

Going green is a straight path. For a

product to be environmentally

sustainable across its whole life cycle,

it needs to use fewer or renewable

resources. It must be safe for the

environment and for us when it's no

longer useful. And most importantly, it

needs to clearly improve over what we're

doing now or even over doing nothing at

all. Let's consider some green

technologies. Some of these new ideas

may sound very promising on paper, but

when we roll them out at scale, they may

not always perform as expected. Take

corn or ethanol for example. It promised

to cut emissions, but ended up

increasing them. Or what about plastics

made from crops like compostable coffee

cups or grocery bags? Sure,

these have lower carbon footprint

compared to petroleum based

alternatives,

but producing enough to replace all the

packaging we need would require over

half the world's corn supply and more

water than all of Europe uses in a year.

Great intentions, but unintended

consequences. Going green is not as easy

as some headlines make it to be. But for

me, it's still worth pursuing.

Real progress requires looking deeper.

Beyond the hype, beyond the feel-good

assumption that anything plant-based is

automatically green. It's about asking

the right questions before we scale a

solution.

So, what if we had a framework with key

questions that we could ask to assess

these new technologies and cut through

the noise? Questions that could tell us

if a product is indeed environmentally

sustainable.

These questions exist and are the

guiding principles driving my research

in my lab at Georgia Tech. And you can

use them too to navigate your everyday

decisions. So next time you want to

evaluate the latest green media darling,

the first thing to consider is what does

it take to make and use this thing? How

much water, land, energy, raw materials?

Are we diverting resources from

essentials like say food or are we

setting ourselves up for the next big

environmental stress point? The second

thing we need to take into account is

what happens after this thing is used.

How is it disposed of? Does it break

down safely or does it create long-term

issues with waste or toxicity?

Disposal matters. Imagine if every time

you took out your trash, you had to

think, is this going to destroy a coral

reef somewhere?

Thinking ahead to a product end of life,

it's crucial to avoid nasty surprises

further down the road. And finally,

question number three concerns

alternatives.

Is the solution better than the status

quo or even better than doing nothing?

Spoiler, there is no perfect solution.

Every choice has trade-offs.

It's like choosing between hitting

snooze one more time or actually getting

out of bed. One gives you more sleep,

the other gets you to work on time, but

you can't have both. So these three

questions together form a guiding

framework toward achieving green

products and technologies. This

framework requires us to consider the

environmental impacts across the full

life cycle of a product as we innovate,

iterate and integrate.

Let's use the electric vehicles, the EVs

as an example to illustrate this

framework.

The technologies underpinning EVs have

come a long way in 30 years. Production

and use of batteries were always the

issue with EVs. 30 years ago, batteries

were very energy intensive to produce

and they were far less efficient. In

fact, in the '9s,

to drive an EV for one mile, you would

need the same energy as to heat a

one-bedroom apartment for 15 minutes. In

the 90s, EVs also used lead acid

batteries, sparking debates over their

adoption. Some said, "Hold up. This can

lead to more lead pollution." Others

argued, "Let's move on and improve as we

go." Luckily for EV fans, the second

argument prevailed.

Scientists and manufacturers innovated

and replaced all their chemistries with

more advanced ones.

Today, EVs are lighter, cleaner, and far

more efficient, requiring less than half

the energy per mile than the early

models. And the grid that we use to

power them is getting cleaner, too, as

it relies more and more on renewables,

like wind or solar power. But what about

the disposal of EV batteries? Back in

the day, recycling options for old

batteries were limited, and there were

serious challenges with waste and

toxicity. But things are improving. New

recycling technologies are emerging,

making it possible to recover valuable

materials from old batteries like

lithium and give them a new life. These

efforts are cutting down on waste,

reducing the need to dig up more

resources and bringing us closer to a

more circular way for producing

batteries.

Of course, there is still progress to be

made, but we're getting there. And here

is where it gets even cooler.

Some companies are finding new ways to

repurpose old batteries. These old

batteries are given a second life as

they are being adapted for stationary

energy storage, powering things like

street lights, stadiums, or even storing

wind or solar energy for homes and

grids. Let's compare the EVs to the

business as usual scenario of gas or

diesel power cars. So EVs generate no

tailpipe emission. Their emissions come

from their manufacturing and from the

production of the electricity we use to

power them. Manufacturing an EV can

generate up to 80% more carbon emissions

than making a conventional car. And this

is mostly due to the mining and

processing of the critical materials

used in batteries. However, once on the

road, EVs tell a different story. The

onroad emissions of EVs depend only on

the electricity we use to the energy. In

places like Norway where hydro power

dominates, EVs have a tiny carbon

footprint. In coal heavy regions on the

other hand, numbers are less impressive

but are still comparable to or even

lower than those of conventional cars.

And the carbon footprint of EV charging

is getting lower too as we transition

more and more to renewables. So that's a

huge step forward for the climate. But

aside from this global climate related

benefits, EVs can also bring major local

benefits because they don't generate

tpipe emissions. They don't release

pollutants like nitrogen oxides and

particulate matter, both of which are

linked to heart and respiratory issues.

So in cities struggling with smog and

poorer quality, Eevees are not just

cleaner for the planet, they are

healthier for all of us.

Even 30-year overnight success is a

proof that lasting change requires the

alignment of diverse groups like the

policy makers who set the regulatory

framework.

The automotive, the battery, the

electronics and other industries

together with the academia and the

scientists who innovated and iterated

tirelessly.

The legal entities who ensured

compliance and clarity. the investors

who believed in the long-term vision and

of course the consumers who embraced the

change. It's a story of a collective

commitment where patience and investment

converged to bring innovation and

integration. What if we apply this

framework to other early stage

technologies like sustainable aviation

fuels, marine bofuels, biodegradable

plastics made from bacteria. All these

are prototypes of today just as EVs were

that of the 90s. If this framework is

adopted early on by all the involved

stakeholders, it can bring this

alignment and enable these technologies

to become mainstream solutions even

faster.

The path to sustainability is not easy,

but it's possible and it definitely

requires to align our efforts across the

value chain. By asking these three key

questions about production, end of life

and alternatives,

we can transition

ambitious green ideas to tangible

enduring solutions. I will leave you

with this plea. Let's we as the TEDex

community embrace this framework and

champion its principles because the

future is not something we wait for.

It's something we build together.

Thank you.

Key Vocabulary

Vocabulary	Meanings
environment /ɪnˈvaɪərənmənt/ A2	noun - the natural world, including plants, animals, air, and water
emissions /ɪˈmɪʃənz/ B1	noun - substances released into the air, often pollutants
carbon /ˈkɑːrbən/ B2	noun - a chemical element, often referring to carbon dioxide in climate contexts
sustainable /səˈsteɪnəbəl/ B2	adjective - able to continue over a long period without causing damage
green /griːn/ A1	adjective - environmentally friendly
technologies /tɛkˈnɒlədʒiz/ A2	noun - scientific knowledge used for practical purposes
impact /ˈɪmpækt/ B1	noun - a strong effect or influence
resources /rɪˈsɔːrsɪz/ A2	noun - natural materials or supplies used to create something
waste /weɪst/ A1	noun - unwanted materials or rubbish verb - to use something in a careless way
disposal /dɪˈspoʊzəl/ B2	noun - the act of getting rid of waste
alternatives /ɔːlˈtɜːrnətɪvz/ B1	noun - other options or choices
batteries /ˈbætəriz/ B1	noun - devices that store electricity
electric /ɪˈlɛktrɪk/ A2	adjective - powered by electricity
vehicles /ˈviːɪkəlz/ A2	noun - machines used for transporting people or goods
production /prəˈdʌkʃən/ B1	noun - the process of making something
renewable /rɪˈnuːəbəl/ B2	adjective - capable of being replaced by natural processes
efficiency /ɪˈfɪʃənsi/ B2	noun - the ability to do something with minimal waste
recycling /riˈsaɪklɪŋ/ B1	noun - the process of turning waste into reusable material
innovation /ˌɪnəˈveɪʃən/ B2	noun - new ideas or methods