'Usually reversible' presentation slideshows

Pesticides

Pesticides. Which one to use?. What is a pest?. Organisms that interfere with human welfare and activities Insects Weeds. Why do we need pesticides?. Insects eating and destroying crops Weeds competing with crops Insects carrying disease. Benefits of pesticides.

611 views • 14 slides

Asthma & Allergies

Asthma & Allergies. What is Asthma?. Chronic inflammatory disorder of the airway, making breathing difficult Usually reversible, but not yet curable Can be fatal Not contagious Not the same as allergies. Should You Be Concerned?.

251 views • 14 slides

Chemistry Vocabulary: Part 2

204 views • 9 slides