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Gernot Wagner
@gwagner@fediscience.org  ·  activity timestamp last week

This graph, based on ClimateActionTracker.org's latest projections, has global CO₂ₑ emissions peak right about now-ish and then decline by 2100.

Good, but look at the slope of the decline. It's basically a slow linear decline.

That's...not how the world works.

²/ₙ

#climate

Global greenhouse gas emissions and expected warming
Global greenhouse gas emissions and expected warming
Global greenhouse gas emissions and expected warming
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Gernot Wagner
@gwagner@fediscience.org replied  ·  activity timestamp last week

Compare that to this collection of paths, pulling from IPCC, IEA, and Shell(!).

Forget the title for now and zero in on the paths.

There's IPCC SSP3-7.0 — NYT says that one won't happen. Good.

But more importantly, look at *all* the others, including Shell's most pessimistic.

#climate

Early decarbonization investments are key to keeping temperatures within livable range and saving trillions in climate costs
Early decarbonization investments are key to keeping temperatures within livable range and saving trillions in climate costs
Early decarbonization investments are key to keeping temperatures within livable range and saving trillions in climate costs
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Gernot Wagner
@gwagner@fediscience.org replied  ·  activity timestamp last week

In short, once clean techs are in the money and the world starts going down the path of decarbonization, change won't be linear.

It never is.

Even the least ambitious Shell scenario reaches near-zero emissions by 2100(!)

#climate #energy #shell #ipcc #iea

zeroing in
zeroing in
zeroing in
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Gernot Wagner
@gwagner@fediscience.org replied  ·  activity timestamp last week

The NYT supports as much: "EVs are now normal."

Yup.

#evs #climate

Electric vehicles are now normal.

The way the world moves has changed. At the time of the Paris Agreement, Tesla had just unveiled its luxury electric SUV. Fast forward to last year: Worldwide, one in five cars sold was electric.

In the United States, 265,000 children ride electric buses to school. In Kenya, electric motorcycle taxis ferry commuters to work. Chinese carmakers are assembling E.V.s abroad, including in Brazil, Indonesia and, soon, in Saudi Arabia, a petrostate.
Electric vehicles are now normal. The way the world moves has changed. At the time of the Paris Agreement, Tesla had just unveiled its luxury electric SUV. Fast forward to last year: Worldwide, one in five cars sold was electric. In the United States, 265,000 children ride electric buses to school. In Kenya, electric motorcycle taxis ferry commuters to work. Chinese carmakers are assembling E.V.s abroad, including in Brazil, Indonesia and, soon, in Saudi Arabia, a petrostate.
Electric vehicles are now normal. The way the world moves has changed. At the time of the Paris Agreement, Tesla had just unveiled its luxury electric SUV. Fast forward to last year: Worldwide, one in five cars sold was electric. In the United States, 265,000 children ride electric buses to school. In Kenya, electric motorcycle taxis ferry commuters to work. Chinese carmakers are assembling E.V.s abroad, including in Brazil, Indonesia and, soon, in Saudi Arabia, a petrostate.
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Gernot Wagner
@gwagner@fediscience.org replied  ·  activity timestamp last week

There's clearly some bad news here, too.

But, for example, natural gas won't be ascendant for much longer, or stay there through the end of the century.

The forces driving down climate tech costs are just too strong.

Argue with exponential growth at your peril.

#climate #climatechange

Utility-scale solar and wind now cheaper than fossil fuels, battery storage costs not far behind and falling fast
Utility-scale solar and wind now cheaper than fossil fuels, battery storage costs not far behind and falling fast
Utility-scale solar and wind now cheaper than fossil fuels, battery storage costs not far behind and falling fast
Natural gas, a planet-warming fossil fuel, is ascendant thanks to America.
Natural gas, a planet-warming fossil fuel, is ascendant thanks to America.
Natural gas, a planet-warming fossil fuel, is ascendant thanks to America.
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