Union of Concerned Scientists

The Union of Concerned Scientists is a membership organization—it’s the support of people like you that ensures science helps build a healthy planet and a safer world.

We depend on your support
 You can be confident your support will be spent wisely—85 percent of donations go directly to fund our program work and for seven consecutive years we have received the Four Star Charity Navigator rating—a distinction achieved by fewer than 2 percent of non-profits.