From f308ef480b630180701f718bb404f4133458db93 Mon Sep 17 00:00:00 2001 From: James Su Date: Mon, 24 Jun 2019 15:25:07 +0000 Subject: [PATCH] Update Unit_3_Ecology_Study_Sheet.md --- Grade 9/Science/SNC1DZ/Unit_3_Ecology_Study_Sheet.md | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Grade 9/Science/SNC1DZ/Unit_3_Ecology_Study_Sheet.md b/Grade 9/Science/SNC1DZ/Unit_3_Ecology_Study_Sheet.md index b96dbe2..412734b 100644 --- a/Grade 9/Science/SNC1DZ/Unit_3_Ecology_Study_Sheet.md +++ b/Grade 9/Science/SNC1DZ/Unit_3_Ecology_Study_Sheet.md @@ -487,6 +487,11 @@ efficiency varies from `5%` to `20%` energy available between successive trophic - Absorb water and slowly release it into the groundwater and surface water (reduces erosion and protects against flooding, filters the water). - Protect land from storms along coasts where wave damage erodes the shoreline. - Mangroves. +- **Monetary Values** + - Very difficult to put a dollar value on it + - Dollar value of cleaning the air/water, moderating climate and providing paper fibre, medicinesand other products is HIGH + - Ranges into trillions dollars/year (maybe 60 trillion?) + - Provides valuable services that are free and renewable. ### Pesticides - Pesticides can easily flow through food chains as there are not easily excreted, like DDT. There are fat-solutable.