Reading and writing fill in the blanks

Increasing concentrations of atmospheric carbon dioxide and changes in climate—such as increasing temperatures and altered precipitation patterns—are expected to accesssubjectcontributecompare contribute to increases in levels and distribution of plant pollen. Pollen from trees and grasses is a common allergen that can defenddeducetriggerpreserve trigger health effects such as allergic rhinitis and asthma. In the United States in 2017, 8 percent of adults reported sufferedsufferingsurvivedsurviving suffering from hay fever. Eight percent of adults also reported suffering from asthma, and this population of asthmatics accounts for 1.7 million emergency department visits yearly. These health effects lead to mentaleconomictechnologicalpsychological economic costs. For asthma, medical expenses and indirect costs added up to $56 billion in 2007. Medical spending to treat hay fever was estimated at $11 billion in 2005.