Polar Bears Need Help_北极熊需要帮助英语作文50字_六年级英语作文 She worries a lot. She worries about polar bears. They are big, white bears. They live in the north. They need snow. They need ice. They need cold weather. There is too much pollution. Pollution heats up the Earth. Heat melts the ice. The ice is the polar bears home. No ice means no home. 本文来源：https://www.wddqw.com/doc/f3b07adb7f21af45b307e87101f69e314232fafb.html