Can anyone help me with my homework.

From 1990 to 2008, by what percent did the world’s most developed economies cut their greenhouse gas emissions?

Identify casue and effect in this unit you learned about several issues that were resolved by compromise during the constitutional convention. create a graphic organized like the one below and use it to show how the compromises affected framework of the new government (the graphic organizer is just 2 columns and one says compromises and one says effect and 3 boxes on each side)you so much!

The information box says that the han added 4,000 miles of wall.refer to the mileage scale.how can this be true?