Study on climate change and food security in the major grain producing areas in China Study on compensation in major grain producing areas Study on the benefit compensation mechanism in the main grain producing areas Benefit compensation mechanism of the major grain producing areas Study on the issues of farmers' income in major grain producing areas Agriculture, climate change and food security in the 21st century :: our daily bread / agriculture, climate change and food security in the 21st century :: our daily bread / Agriculture, climate change and food security in the 21st century :