free or in in captivity?, function of zoos (1-3), function of natural reserves, power plants: curse or blessing?, energy resources: renewable or traditional?, individual transportation: traditional, hybrid or electric?, fuction of parks /jungles: what's our responsibility?, pollution: is it inevitable?, recycling.

nature, subtopics

由
嵌入

排行榜

隨機卡是一個開放式範本。它不會為排行榜生成分數。

視覺風格

選項

切換範本

恢復自動保存: ?