How to pronounce "rougher"

that could increase emissions from agriculture.

Some amount of carbon capture at factories and sustainable bioenergy

will absolutely be part of the picture.

But I’ve been in politics,

and I am sure that we should plan for imperfect policy.

And that means we need to plan

for building even more electricity generation.

We can use this additional generation to synthesize fuels

that are truly carbon neutral or entirely carbon free:

hydrogen, ammonia, synthetic jet fuel and others.

This is a much rougher estimate,

but to be confident of minimizing climate change impacts,

we should aim to push our line up to around 90 petawatt hours per year.

Finally, the fourth reason is that we need not only net-zero

but net-negative emissions in 2050.

There will be some non-energy emissions that remain, especially from agriculture.

And we'll have to pull CO2 from the atmosphere

to make up for those.

But we also need to use all our possible carbon-removal methods

at their maximum capacity

to remove more CO2 each year,