The Greenhouse Effect is a warming of Earth's surface and the air above it. It is caused by Greenhouse gases in the air that trap energy from the Sun and keep the Earth at a temperature that is suitable for living things. In the last century, Earth’s global temperatures have gradually increased. This phenomenon is referred to as global warming. While there are many contributing factors to this global rise in temperatures, what do scientists hypothesize to be the primary cause of global warming?

Does anyone know the answers for these

Which of the following statements best characterizes changes to agriculture in the united states since 1900? a. increased mechanization has reduced the need for labor. b. increased mechanization has increased the need for water, thereby increasing the need for labor. increased mechanization has increased the use of land, thereby increasing the need for labor. d. increased mechanization has increased food production, thereby increasing the need for labor. select the best answer from the choices provided.

In the figure, polygon abcd is transformed to create polygon a′b′c′d′. this transformation is a by a factor of .