1-C. Portland has the highest rate of bicycle commuting among large cities at 6.1 percent, partly because of its mild climate.Portland has the highest rate of bicycle commuting among large cities at 6.1 percent, partly because of its mild climate.
2-C. Climate change may be causing an increase in the number of these beetles, and they are beginning to have an effect on a growing number of pine species.Climate change may be causing an increase in the number of these beetles, and they are beginning to have an effect on a growing number of pine species.