Who was not invited to Biden's climate summit?

The United States has invited global leaders, including the leaders of China and Russia, to participate in a summit on climate change in April, US President Joe Biden said on Friday.

Chinese President Xi Jinping and Russian President Vladimir Putin are among the 40 world leaders invited to the summit, to be held on April 22-23, according to a White House.

Earth Day global summit on climate is part of his effort to elevate climate change as a top priority in the world but one nuclear power country is not invited, Islamic Republic of Pakistan. It will be held virtually given pandemic restrictions and live-streamed for public viewing.

However, the omission of Pakistan from the list of invitees to the conference has raised concerns as the country is among those most vulnerable to climate change. 

As per the Global Climate Risk Index 2021, presented by german watch, Pakistan is the fifth-most vulnerable country to climate change.

The American president's decision is also surprising as climate change has been a key area of focus for Prime Minister Imran Khan like billion tree program in Pakistan. The country under his leadership has taken several important steps to battle climate change, including an ambitious plan to plant a billion tree.