President Donald Trump declared the end of a "war on coal" Tuesday, as he moved to curb rules that underpin American emissions targets and a major global climate accord.

Following through on an election promise, Trump signed an order to review some of his predecessor Barack Obama's climate legacy, declaring an end to "job-killing regulations."

U.S. President Donald Trump will on Tuesday roll back a slew of environmental protections enacted by Barack Obama, in a bid to untether the fossil fuel industry.

In a maiden trip to the Environmental Protection Agency, Trump will sign an "Energy Independence Executive Order," a White House official told AFP.

A "monster" cyclone smashed into northeast Australia Tuesday, cutting power, damaging buildings and uprooting trees, with coastal towns in lockdown as residents battled lashing rain and howling winds.

President Donald Trump will sign an executive order Tuesday to undo his predecessor Barack Obama's plan to limit greenhouse gas emissions from coal-fueled power plants, according to the new environmental chief.

The Empire State Building and United Nations headquarters in New York joined other iconic buildings and monuments around the world plunging into darkness for sixty minutes on Saturday to mark Earth Hour and draw attention to climate change.

From Sydney to New York, cities and monuments will dim their lights on Saturday in a show of solidarity against the threats being faced by the planet from humankind.

This year marks the tenth anniversary of Earth Hour, an annual bid to raise awareness about global warming caused by the burning of coal, oil and gas to power cars and power plants.

Approximately one in four children worldwide will live in regions with extremely scarce water resources by 2040, UNICEF said in a report Wednesday.

Stranded on their rooftops by flooding and mudslides, residents of Huarmey, Peru ironically need the one thing they see everywhere they look: water.

Dubai on Monday completed a solar plant big enough to power 50,000 homes as part of a plan to generate three-quarters of its energy from renewables by 2050.

Torrential rains triggered flash floods in the Peruvian capital Lima, stranding thousands of people Friday and forcing rescuers to find ways to evacuate them across roads turned to raging rivers.