The impact of pesticides on human health and natural ecosystems is what Carson began to assemble data about. In employing chemical pesticides, Carson argued for much greater sensitivity and care to the environment. As a preferable alternative for pest control, Carson further urged natural biotic agents. As cancer and other ailments took their toll, Carson's health deteriorated while her mother died in 1958. In 1962 the book Silent Spring was published. However, it provoked a lot of criticism. Rachel Carson was born in 1907 and never married. Since Carson called into question the idea of science as progress, she evoked a huge backlash.

April 20

Rachel Carson was an author who's childhood interest in nature led to a career as a marine biologist with the U.S. While penning three books on the ecology of the sea, she was also finding her voice as a writer. Her confidence in the fact that nature was immune to human action has been shook by the dramatic bombings in 1945 of Hiroshima and Nagasaki. The assumption that for human welfare, science always held positive outcomes began to be questioned by Rachel Carson. The environment introduced pesticides and other toxins, which caused the skepticism of science always having positive outcomes for human welfare to take shape in the name of progress. Silent Spring was a project that Carson took on due to the death of birds in her friend's yard following aerial spraying for mosquito control.

April 19

In many major cities, a pall of air pollution was created by the global spread of modern industry. Face masks were frequently worn by traffic police in Tokyo during the 1970s. It was estimated in 2002 that 35,000 people in Mexico City were killed from air pollution. By the late 1980s, about half of the Soviet Union's rivers were severely polluted from industrial pollution. The earth is protected by the ozone layer from excessive ultraviolet radiation. Global warming was the most intractable and critical environmental transformation. The atmosphere had begun to be warmed significantly due to the vastly increased burning of fossil fuels, which occurred by the end of the twentieth century.

April 18

The energy resources available to our species was added to by natural gas, hydroelectricity, and nuclear power. The production of goods and services was immensely increased by modern science and technology. The natural order was always altered by human activity, but now the scale of that impact assumed geological and global proportions. The doubling of cropland was led to by the growing consumption of the rich and the growing numbers of the poor, which also led to dramatic increases in the rate of erosion. At the hands of humankind, massive species extinctions is happening. In environments shaped by human action is where 90 percent of all plant activity now occurs.

April 17

Humankind's growing ability to alter the natural order has been the most pronounced out of all distinctive features of the twentieth century. The Anthropocene or the Age of Man is what scientists began to refer to the current era as. The lasting impact of human activity on the planet is what this informal term has called attention to. In 2012, the world was left with over 7 billion people, in comparison to 1900 when the world had about 1.6 billion people. Death rates and Green Revolution technologies were lowered by medical and sanitation advances. The new ability of humankind to tap the energy potential of fossil fuels lay in a second cause of environmental stress. This led to oil in the twentieth century and coal in the nineteenth.

April 15

Religious practice and belief declined sharply in Britain, the Netherlands, France, and the Soviet Union. Those trends that involved the further spread of major world religions were the far more prominent trends of the last century. In this most recent century, religion played an unexpectedly role. As transregional cultures Christianity, Buddhism, and Islam have been spreading far beyond their places of origin. In the West, Buddhist ideas and practices such as yoga and meditation found a warm reception. Perhaps 7 to 8 percent of China's population claimed allegiance to the faith; some 84 to 96 million people did so by the end of the twentieth century. Asia, Latin America, and Africa is where by the early twenty-first century, Christianity found some 62 percent of its adherents. A certain religion was planted solidly in the West by millions of migrants from the Islamic world. In the United States, both African Americans and European Americans engaged in Islamic practice.

April 10

From a value of some $57 billion in 1947, world trade skyrocketed to about $16 trillion in 2009. Goods from every part of the globe were stocked in shelves of department stores and supermarkets around the world. In more than 100 countries, twinings of London marketed its 120 blends of tea, and in 180 countries the Australian based Kiwi shoe polish was sold. Components from China were reportedly included in about 70  percent of Walmart products in 2005. With manufacturing facilities in at least eighteen countries, Toyota replaced General Motors as the world's largest automaker the following year. In developing countries, tax breaks, cheap labor, and looser environments were taken advantage of from companies in rich counties after 1960.