Recent research shows that the last 11,300 years were colder than the last 10 years. Humans are doing this. But we can fix this by scrubbing CO2 from the atmosphere, while we simultaneously transition to a green infrastructure.
The transition to green energy is a noble goal, but it is not possible to implement quickly enough to avoid catastrophic climate consequences that will effectively ruin life for humanity over the course of the next few decades.
This is why we MUST have state-sponsored programs in the USA and around the world to implement "CO2 scrubbing" AKA "carbon capture" technology. This is the best and only way to ensure that our planet remains livable. See this National Geographic article for more info: http://ngm.nationalgeographic.com/big-idea/13/carbon-capture