Data for a trend in temperature change in the Northern Hemisphere of Earth has been used many times as evidence for global warming. Which is the best method for determining the validity of this conclusion? Form a new hypothesis based on new climate data.

Repeat the research linking pollution emissions and global warming.

Evaluate the public response to laws passed based on this conclusion.

Examine the data collection process and replicate the data analysis procedures.​

Four types of motile cells in human body?

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?