This is the fourth installment of a four-part series published each Wednesday on Action Needed to Stop Global Warming.
1. How Warm is Too Warm?
2. Worldwide Emissions Target
3. U.S. Emissions Target
4. Technologies to Get Us There
In Part 1 of this series, I defined the global tipping point as the melting of the Greenland ice sheet, which could cause sea levels to rise 20 feet. In Part 2, I showed that to avoid this tipping point, global emissions of carbon dioxide (CO2) must start to decline around 2020. In Part 3, I showed what the U.S. must do to help the world meet these targets.Meeting these targets will require significant changes in how we produce and use energy, and this makes many people nervous. They worry that the cost will wreck the economy, and they’ll have to give up their cars and air conditioning. Not true!