Original sentence: In the 21st century, the European Union, the United States, Canada, Mexico, Japan, and many other countries require producers to obtain special certification in order to market their food as organic within their borders
Edited sentence: Currently, the European Union, the United States, Canada, Mexico, Japan, and many other countries require producers to obtain special certification in order to market their food as organic within their borders.These environmental and health issues are intended to be minimized or avoided in organic farming.Worldwide, the use of some fertilizers and pesticides in conventional farming has and is causing a lot of damage to local ecosystems, biodiversity, groundwater (and sometimes drinking water) supplies, and possibly the health and fertility of farmers and farmworkers