This book presents all aspects of this enormous challenge, in which agriculture will once again be called upon to take centre stage. The different sources of renewable energy sources, the issues of climate change, the DDHu which fights against climate change, the future of agricultural subsidies, the land question with proposals for agricultural contracts to avoid conflicts between farmers and livestock farmers, practical training of young people in agricultural professions, the reorientation of agriculture after COVID-19 are presented.This book proposes a dimensioning of PV systems for irrigation, the calculation of evapotranspiration using the FAO CROPWAT software, with case studies, the different types of crop varieties: maize, garlic, onion, rice, tomato, okra, etc..This book is a prospect for anyone concerned about the future of the world. The production and use of compost has been one of the practices developed in this book. It is available worldwide in English, French, Dutch, German, Italian, Polish, Portuguese, Russian, Spanish and also in Arabic.