Log In
|
Register
Practical Action
Who we are
About us
What's new
Annual report
Video
Consulting
Publishing
Jobs
Contact us
What we do
Energy
Shelter
Transport
Water & sanitation
Food & agriculture
Disaster mitigation
Climate change
ICTs
Policy & advocacy
Campaigning
Education
Practical Answers
Technical enquiries
Reducing vulnerability
Markets and livelihoods
Access to services
New technologies
Where we work
Bangladesh
East Africa
Latin America
Nepal
South Asia
Southern Africa
Sudan
United Kingdom
Get involved!
Support us
Make a donation
Regular gift
Practical Presents
Local Groups
Challenge events
Campaign with us
Stop Climate Injustice
Make the Link
e-newsletter
Donate
One-off donation
Regular donation
Our other sites
Development Bookshop
Publishing
Consulting
Latin America
Practical Answers
Practical Presents
Sustainable Design
STEP
Climate Choices
Stop Climate Injustice
African Voices
Indoor Air Pollution
Glowstar lantern
Search
Practical Answers Home
Technical Information Online
Technical Enquiry Service
Resource Centres
Technology Themes
Adaptation to climate change
Agriculture
Construction
Crop and food processing
Disaster mitigation & rebuilding
Energy
Information and communication
Manufacturing
Mining and minerals
Natural resource management
Transport
Waste and recycling
Water and sanitation
Media types
Technical Briefs and Manuals
Video
Engineering Drawings
Stories of Change
Contact Us
Advanced Search
-
Add to browser
Download list
You have no items in your download list.
Login
to save
your download list
.
Notifications
Notify me of updates to
Tell a friend
Tell someone you know about this article.
Sign In
email:
password:
Forgotten password?
Technical Information Online
Article not found!
Continue
Practical Action
|
Privacy Notice
|
Conditions of Use
|
Saturday 07 November, 2009
