The Tesla billionaire is a key figure in the president-elect’s orbit. One question is whether his views on climate and clean energy will have any sway.

© Doug Mills/The New York Times

A surge in power use worldwide could make it harder for nations to slash emissions and keep global warming in check.

The threat of an escalating conflict between Israel and Iran has created an “extraordinarily precarious” global situation, sowing alarm about the potential economic fallout.

Much of the good news about green energy is coming out of one country.