TALENT, Ore. — When Diane Ware’s home state of Oregon proposed a natural gas pipeline that threatened local waterways, she sprang into action — leading workshops on lobbying state lawmakers, mentoring student activists and organizing lectures at her church. But when plans for the pipeline were canceled, Ware, 78, found little pleasure in the victory. The retired elementary school teacher couldn’t shake the feeling that it may be too late to save a planet in deep peril — a prospect tinged with grief, anger and depression. Ware realized she had a case of "climate grief” — and needed help.