[Sherman Logan]

Environmentalists say the way to slow climate change is by reducing greenhouse gases by 40 to 70 percent by 2050 through development of green, or renewable, energy sources and conservation.

Not even theoretically possible. What the idiotic author was trying to say was "reducing emission of greenhouse gases by 40 to 70 percent by 2050."

[Politically Correct]

Not even theoretically possible. What the idiotic author was trying to say was "reducing emission of greenhouse gases by 40 to 70 percent by 2050."

Correct.
Reducing CO2 by 40 to 70 percent would result in world wide famine due to reduced plant growth......
But maybe that's their intent ";^)