Near Right- the ruins of Tikal. In addition to cutting down trees for fields, they cut them down for cities, too. Far right- Drought-stricken fields.I think the Mayans collapsed because they cut down so many trees that there weren't enough trees to cut down the amount of carbon dioxide, so they breathed in lots of carbon dioxide and lots died. There is also evidence of a drought soon after, which would have killed plants, making it so there wasn't anything to purify the air for them. And the drought might have made the land so bad that it just wasn't worth living there. So, they decided "Yucatan Ho!"
