KISS for Climate Marchers

Science Matters

Keeping it simple, here’s the elevator speech for climate marchers, excerpted from a more lengthy article linked below.

Expect more craziness this weekend. Earth Day is Saturday. This year’s theme: Government must “do more” about climate change because “consequences of inaction are too high to risk.”

They make it sound so simple:

1) Man causes global warming.

2) Warming is obviously harmful.

3) Government can stop it.

Each claim is dubious or wrong.

1) Man’s greenhouse gases contribute to warming, but scientists don’t agree on how much. Of 117 climate models from the 1990s, 114 overpredicted warming.

2) Warming is harmful. Maybe.

But so far it’s been good: Over the last century, climates warmed, but climate-related deaths dropped. Since 1933, they fell by 98 percent. Life expectancy doubled.

Much of that is thanks to prosperity created by free markets. But some is due to warming. Cold kills more people than…

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