This volume comprehensively covers soil microbial processes that regulate the flux of greenhouse gasses (GHG) from agricultural soils, in an effort to address how GHG regulating microbes can be used to mitigate harmful climate change impacts on agriculture. The chapters define the linkages among soil microbial functioning, crop responses, ecosystem functioning, and GHG cycling processes. The book is framed through three major theme, including source and sink of GHG, microbial processes regulating GHG, and agricultural strategies and technologies to mitigate GHG emissions. The chapters highlight the fundamentals of soil microbial diversity and interactions with climate changing factors, soil carbon dynamics in response to different agricultural practices, conservation agriculture strategies to reduce GHG emissions from agriculture, and climate change mitigation through organic and climate-smart farming. The book is intended for policy makers, students, and researchers of environmental science, agriculture, soil science, and soil microbiology.