Conservation means both development and protection.This generation may use resources today, but they may not ruin things for the next generation.We are poor stewards if we ruin the land and leave it worthless for our children.We are good stewards if we leave the land better than we found it.
A convention is an agreement between 2 countries helping over a particular problem, less formal then a treaty . Also a convention is a gathering where people meet and discuss a problem or similar interests.