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The Dhauladhar range of mountains is visible from the city due to a drop in pollution levels, on day ten of the 21-day lockdown to check the spread of coronavirus. Photo: Hindustan Times / Contributor

People are able to see blue skies for the first time in years as India's three-week coronavirus lockdown has drastically cut air pollution across the country, The Washington Post writes.

Why it matters: India is notorious for its air pollution — among the worst in the world. The speedy drop in the level of particle pollution by nearly 60% in capital city New Delhi has surprised experts, but the clean air has come at a cost for the country.

What's next: Chief Minister of Delhi Arvind Kejriwal tweeted that Indian Prime Minister Narendra Modi has decided to extend the country's lockdown, originally set to expire April 14.

The India Gate before:

Photo: Biplov Bhuyan/Hindustan Times via Getty Images

The India Gate after:

Photo: Pallava Bagla/Corbis via Getty Images

The Yamuna River before:

A man rows his boat surrounded by toxic foam and smog caused by pollution in November. Photo: Sahiba Chawdhary/NurPhoto via Getty Images

The Yamuna River after:

A boy swims in the Yamuna River during the coronavirus outbreak. Photo: Amarjeet Kumar Singh/Anadolu Agency via Getty Images

The Taj Mahal before:

Photo: STR/AFP via Getty Images

The Taj Mahal after:

Photo: Stringer/Anadolu Agency via Getty Images

Go deeper: The pandemic and pollution

Go deeper

World leaders react to "new dawn in America" under Biden administration

President Biden reacts delivers his inaugural address on the West Front of the U.S. Capitol on Wednesday. Photo: Alex Wong/Getty Images

World leaders have pledged to work with President Biden on issues including the COVID-19 pandemic and climate change, with many praising his move to begin the formal process for the U.S. to rejoin the Paris Climate Agreement.

The big picture: Several leaders noted the swift shift from former President Trump's "America First" policy to Biden's action to re-engage with the world and rebuild alliances.

Updated 5 hours ago - Politics & Policy

In photos: The Biden and Harris inauguration

President Biden and first lady Jill Biden watch a fireworks show on the National Mall from the Truman Balcony at the White House on Wednesday night. Photo: Chip Somodevilla/Getty Images

President Biden signed his first executive orders into law from the Oval Office on Wednesday evening after walking in a brief inaugural parade to the White House with first lady Jill Biden and members of their family. He was inaugurated with Vice President Kamala Harris at the U.S. Capitol on Wednesday morning.

Why it matters: Many of Biden's day one actions immediately reverse key Trump administration policies, including rejoining the Paris Agreement and the World Health Organization, launching a racial equity initiative and reversing the Muslim travel ban.

Republicans pledge to set aside differences and work with Biden

President Biden speaks to Sen. Mitch McConnell after being sworn in at the West Front of the U.S. Capitol on Wednesday. Photo: Erin Schaff-Pool/Getty Images

Several Republicans praised President Biden's calls for unity during his inaugural address on Wednesday and pledged to work together for the benefit of the American people.

Why it matters: The Democrats only have a slim majority in the Senate and Biden will likely need to work with the GOP to pass his legislative agenda.