Factbox-United States, other countries, ramp up climate-change ambition

(Reuters) -The United States said it aims to halve its greenhouse gas emissions by 2030 in a bid to fight climate change. The new target was announced at the start of a two-day international climate summit hosted by President Joe Biden, which is intended to showcase rising global ambition to slash carbon emissions and stop global warming.

Here is a table showing countries that have pledged more ambitious efforts than before to cut greenhouse gas emissions, either on the first day of the summit or in the run-up to the conference: