G+-+Environmental+Issues

**media type="youtube" key="B4yrpkZgRww" height="344" width="425"media type="youtube" key="srGwCFcOGjk" height="344" width="425" The Greenhouse effect:**

Global warming is the increase in global temperatures since the mid-20th Century. It is caused by the release of Carbon dioxide. This is released from the burning of fossil fuels. These come from:

·  Power stations ·  Cars ·   Factories

It is also caused by the release of methane from agriculture (cattle farming) 

**Acid rain:** All rain is naturally acidic due to a reaction between water and carbon dioxide. This forms carbonic acid. This has a pH of 5.6. Factories and cars release sulphur dioxide and nitric oxide into the atmosphere. This reacts with water and forms either sulphuric acid or nitric acid. This then falls a rain causing: ·  <span style="font-size: 12pt; font-family: Calibri; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-fareast-language: EN-GB; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; msofareastfontfamily: 'Times New Roman'; msobidifontfamily: 'Times New Roman'; msofareastlanguage: EN-GB; msoasciifontfamily: Calibri; msohansifontfamily: Calibri;">Damage to trees and plants <span style="font-size: 12pt; font-family: Symbol; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol; mso-fareast-language: EN-GB;">· <span style="font-size: 7pt; font-family: 'Times New Roman','serif'; mso-fareast-font-family: Symbol; mso-fareast-language: EN-GB;"> <span style="font-size: 12pt; font-family: Calibri; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-fareast-language: EN-GB; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; msofareastfontfamily: 'Times New Roman'; msobidifontfamily: 'Times New Roman'; msofareastlanguage: EN-GB; msoasciifontfamily: Calibri; msohansifontfamily: Calibri;">Decrease in the pH of lakes killing fish <span style="font-size: 12pt; font-family: Symbol; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol; mso-fareast-language: EN-GB;">· <span style="font-size: 7pt; font-family: 'Times New Roman','serif'; mso-fareast-font-family: Symbol; mso-fareast-language: EN-GB;"> <span style="font-size: 12pt; font-family: Calibri; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-fareast-language: EN-GB; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; msofareastfontfamily: 'Times New Roman'; msobidifontfamily: 'Times New Roman'; msofareastlanguage: EN-GB; msoasciifontfamily: Calibri; msohansifontfamily: Calibri;">Damage to limestone buildings – statues lose their detail <span style="font-size: 12pt; font-family: 'Times New Roman','serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: EN-GB;"> Ozone link for year 11 only - []