Scientists disagree about whether paper bags or plastic bags are less harmful to the environment. which fact supports the use of plastic bags instead of paper bags? a. plastic trash causes the deaths of more than 100,000 birds and other animals each year. b. people recycle 20% of their paper bags but only 1% of their plastic bags. c. it takes thousands more years to break down plastic than it takes to break down paper. d. twenty times more water is used in making a paper bag than in making a plastic bag.

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.