Eco-Knowledge for 11-15 years oldby ENE LLC ENT LTD Entrepreneurial Charity Entities
Parental attention, inspiration & teacher's guidance needed. More@https://www.pinterest.com/nmjrlaudato... @https://bit.ly/2qjgd6R @https://bit.ly/2COs2ty Learn more: Air - https://bit.ly/2OWTD Recommended Features
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Review on Eco-Knowledge for 11-15 years oldNew MacroJobHouse Ranger
Published on Aug 18, 2018
This video is aimed at children aged between 11 and 15 and their teachers.
Air is a mixture of nitrogen, oxygen CO2 and some inert gases.
It also consists of water vapours of varying quantity.
Air also contains numerous harmful substances: natural pollutants such as dust and volcanic ash, and pollutants that are by-products of human activity.
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Created on Nov 23rd 2018 01:40. Viewed 1,014 times.