A great increase in production of food grains (especially wheat and rice) resulted in large part from the introduction into developing countries of new, high-yielding varieties, beginning in the mid-20th century

Manipulating a cell or organism to change its basic characteristics. Farmers also used more irrigation, fertilizers, and pesticides.

An American researcher who developed an injectable vaccine against polio had proven effective

the loss of Earth’s trees as a result of cutting down trees so the land could be used for agriculture

The removal of the natural vegetation cover through expansion and intensive use of agricultural lands in arid and semi-arid lands

This term means “new man.”Scientists wanted to change the name because humans now affect

almost the entire planet.

The first major international agreement to reduce carbon  signed in 1997.

This  gave new hope for progress against global warming. Leaders of both the United States and China supported this new deal. However, in 2017, President Donald Trump announced that the United States would withdraw from the Paris Agreement.

Are economic systems based on supply and demand, with as little government

control as possible.

The North American Free Trade Agreement. This agreement encouraged U.S. and Canadian industries to build maquiladoras (factories) in Mexico that used low-wage Mexican labor

to produce tariff-free goods for foreign export.