"For an earnest young Christian named Ben Lowe, revelation came on the shores of Lake Tanganyika, in Africa. A relentless warming of the lake was reducing the catch of fish, the people were going hungry — and he had learned of scientific evidence that climate change was to blame."

"In a new study, scientists with the University of Alaska at Fairbanks and several other institutions report a staggering finding: Glaciers of the United States’ largest — and only Arctic — state, Alaska, have lost 75 gigatons (a gigaton is a billion metric tons) of ice per year from 1994 through 2013."

"California’s drought has put the great Central Valley aquifer system under critical stress, but many of the world’s major groundwater basins are in far worse shape, a new satellite survey has found."

"As the steamy hurricane season descends on Miami, the city’s Roman Catholic archbishop, Thomas G. Wenski, is planning a summer of sermons, homilies and press events designed to highlight the threat that a warming planet, rising sea levels and more extreme storms pose to his community’s poorest and most vulnerable."

"Renewables could surpass coal, natural gas, and nuclear as the world's top electricity source in 15 years, according to an IEA report. Still, without bolder emissions cuts, the world is on track to blow past its global warming targets."

"Renewable energy could surpass coal, nuclear power, and natural gas as the world’s largest source of electricity within only 15 years, according to a new report from the International Energy Agency.

"Pope Francis makes an urgent call for protection of the planet and repeats his view that global warming is mostly man-made in his keenly awaited encyclical, according to a draft published by an Italian magazine on Monday."

"The pension funds of millions of people across the world, including teachers, public sector workers, health staff and academics in the UK and US, are heavily exposed to the plummeting coal sector, a Guardian analysis has revealed."

"VATICAN CITY — Ban Ki-moon arrived at the Vatican with his own college of cardinals. Mr. Ban, the United Nations secretary general, had brought the leaders of all his major agencies to see Pope Francis, a show of organizational muscle and respect for a meeting between two global institutions that had sometimes shared a bumpy past but now had a mutual interest." A roundup of stories about the papal encyclical to be released Thursday.

"In a major report to be released Monday, the Paris-based International Energy Agency — which provides independent energy analysis and has 29 member countries, including the United States — will state that current national commitments to cut greenhouse gases are still insufficient to keep the world below two degrees Celsius of warming above preindustrial levels."