Former Vice President Joseph R. Biden Jr., who has faced criticism from Democratic presidential rivals about his commitment to combating climate change, on Tuesday unveiled a plan that promised to reinstate the climate policies of the Obama administration but also included some unexpected proposals that would push significantly beyond what the previous White House achieved. Mr. Biden, who in tone and substance is one of the most centrist candidates seeking the Democratic nomination, has insisted he is no moderate when it comes to protecting the environment, though progressives have been skeptical. Polls show that fighting climate change is a top priority for Democratic voters, and Mr. Biden selected the issue for his second policy rollout, after an education plan he […]