Natural ecosystems were distributed on the day some 11000 years ago that the first planet dwellers decided to dig holes in the ground and plant seeds and tubers. Today the planet has to cope with over 6 billion people and urbanisation, industrialisation, poverty, while agricultural practices continue to impact on the environment. Assessing impact on the environment is much more than just a tunnel vision approach on hypothetical risks of Genetically Modified (GM) crops. This book focuses on the ecological assessment of Genetically Modified food crops. It covers in detail the development, use and regulation of GM crops. The applications and risks of food crops are also described in detail. The book is written for students, researchers and professionals in plant biotechnology and related sciences such as plant science, biotechnology, bioscience, environmental science and food science. It will stimulate readers thinking on key constraints in agriculture. Readers will get acquainted with a wide range of information, technologies and methodologies.