The gap between the world’s greenhouse gas emissions and countries’ planned reductions is growing, and only multiplying climate cuts can reduce global warming enough.

The planet's protective layer is finally recovering from damage caused by aerosol sprays and coolants, according to a new United Nations report.

Scientists also find that deaths linked to smoke from wildfires could more than double in the U.S., to perhaps 40,000 a year.

The costs of not acting against climate change are high. The benefits of investing in a clean-energy economy would be widespread.

Called the Emerald Isle for its natural beauty, Ireland’s rising greenhouse gas emissions are making it Europe’s climate laggard.

Humankind has already disturbed or degraded six-sevenths of the world's oceans. And that is apart from the rising acidification and other malign consequences of global warming.

Lawmakers ban investment in companies that derive more than 20 percent of their revenue from coal, oil and gas, the key drivers of climate change. Ireland is the first country in the world to take such action.

Hazards multiply when the two weather phenomena combine, and by the close of the century, scientists say, a two-fisted assault could be underway.

Plastic detritus threatens to swamp the planet, but laboratories around the world are working on solutions, by finding ways to use energy more efficiently and by exploiting natural wastes.