The use of biomass as a solution to all energy needs is limited by the non-renewability of biomass.
a) a lack of technology to process and burn biomass.
b) a shortage of land to grow plants for energy consumption.
c) a lack of appropriate plants.

Because its government strictly controls its economy, north korea has a economy. a. command b. mixed c. traditional d. free market

Good scientists always report their observations and results truthfully. this is especially important when a scientist's results go against previous ideas or predictions. coming up with inventive ways to solve problems or produce new things

Extensive and unusual cold snaps have occurred here recently. is this evidence that global warming is lessening or not occurring? no—although the long-term trend is for warming, short-term weather patterns can still be variable. no—melting of glaciers and ice caps is making the oceans cooler, which can cause cold snaps. yes-- if global warming really were occurring, cold snaps wouldn’t happen. yes—due to global warming, weather patterns should be become less—not more—variable.