Our guest in this Trump on Earth episode says if Trump's replacement plan holds up in court, it could hamstring future presidents from tackling climate change.
Pa. Attorney General Josh Shapiro seems to be making good on a campaign promise to "hold the oil and gas companies criminally liable for poisoning our air and our drinking water.”
Methane is a potent greenhouse gas. Environmentalists say proposed state rules are too lenient, industry says they're too costly. But they might bring new technology and jobs to the state.