Humans and animals are not the only creatures that migrate. Plants also do. This book is a comprehensive and analytical account of the migration of an Old World plant, water hyacinth (also known to botanists as Eichhornia Crassipes) from the Amazon Basin and surrounding areas to Africa through human agency from about 1800 to the present. As an integrative work, which benefits from methodologies and conceptual approaches drawn from limnology, botany, biology, geography, history, ecology and other social sciences and humanities, the book further explores the political, economic, and ecological consequences of the spread of water hyacinth from its native habitat through European botanical gardens to Africa rivers, lakes, dams, and wetlands. In part, as a narrative of Western tinkering with African ecologies gone awry, the study has strong lessons for environmental historians, and social scientists as well as contemporary foundations, aid workers, development experts and African governments. Although it may appear to be a micro-history of a single plant, water hyacinth, it illuminates broader issues in the history of the modern environment in Africa and similar studies worldwide. This study is primarily rooted on the histories of colonialism, bioinvasion, environmental realities and experiences in Africa. The highly visible pathways of hyacinth’s spread across international frontiers along watercourses and communication networks means that not only is this a trans-boundary environmental affair, but one which directly involves bilateral relations between African states.

This is the second comprehensive report on the state of Africa's environment, produced in collaboration with the African Ministerial Conference on the Environment (AMCEN). This report highlights the central position Africa's environment continues to play in sustainable development, as well as its potential to achieve progress in the implementation of the Millennium Development Goals. The report profiles Africa's environmental resources as an asset for the continent's development. It highlights the opportunities presented by the region's natural resource base to support the continent's development. It also underscores the concept of sustainable livelihoods, and the importance of the environmental initiatives in supporting them.

Every year lakhs of students appear for the NEET Exam to pursue their dream of becoming a “Doctor”. In order to qualify this exams students need have clear concepts, strong basic foundation of the subjects and thorough practice. “TEST DRIVE FOR NEET 2020” is the one and only complete assessment and Practice package for the NEET Exam. This book is prepared as per the latest of the syllabus. It provides 30 Unit Tests for all three sections: Physics, Chemistry and Biology, 12 Mock Tests which are strictly based on the Latest Examination Pattern and more 1000 Subjectwise most difficult questions of 15 Years’ of NEET & AIPMT moreover, the solutions provided for the questions are authentic and having a conceptual approach for the complete practice. This book will help you to score more in the exam as well as in the academics if thorough practice done from this book. TABLE OF CONTENT Module 1: Prep Analysis, Module 2: Prep Catalysis, Module 3: The NEET Edge.

Named one of the best books of 2015 by The Economist A provocative exploration of the “new ecology” and why most of what we think we know about alien species is wrong For a long time, veteran environmental journalist Fred Pearce thought in stark terms about invasive species: they were the evil interlopers spoiling pristine “natural” ecosystems. Most conservationists and environmentalists share this view. But what if the traditional view of ecology is wrong—what if true environmentalists should be applauding the invaders? In The New Wild, Pearce goes on a journey across six continents to rediscover what conservation in the twenty-first century should be about. Pearce explores ecosystems from remote Pacific islands to the United Kingdom, from San Francisco Bay to the Great Lakes, as he digs into questionable estimates of the cost of invader species and reveals the outdated intellectual sources of our ideas about the balance of nature. Pearce acknowledges that there are horror stories about alien species disrupting ecosystems, but most of the time, the tens of thousands of introduced species usually swiftly die out or settle down and become model eco-citizens. The case for keeping out alien species, he finds, looks increasingly flawed. As Pearce argues, mainstream environmentalists are right that we need a rewilding of the earth, but they are wrong if they imagine that we can achieve that by reengineering ecosystems. Humans have changed the planet too much, and nature never goes backward. But a growing group of scientists is taking a fresh look at how species interact in the wild. According to these new ecologists, we should applaud the dynamism of alien species and the novel ecosystems they create. In an era of climate change and widespread ecological damage, it is absolutely crucial that we find ways to help nature regenerate. Embracing the new ecology, Pearce shows us, is our best chance. To be an environmentalist in the twenty-first century means celebrating nature’s wildness and capacity for change.

Whenever a student decides to prepare for any examination, her/his first and foremost curiosity arises about the type of questions that he/she has to face. This becomes more important in the context of NEET/AIPMT where there is a neck-to-neck race. For this purpose, we feel great pleasure to present this book before you. We have a to provide chapter wise questions asked in NEET from 1993 to 2021 along with solutions. Features Chapterwise Solved Papers with Model Test Papers with detailed solution. Topic-wise collection of past NEET questions (1993 - 2021). Solutions have been given with enough diagrams, proper reasoning for better understanding. Students must attempt these questions immediately after they complete the unit in their class/school/home during their preparation.