Showing posts with label percentages. Show all posts
Showing posts with label percentages. Show all posts

Here to Help Part 2: The Words Don't Fit The Picture

























Math test:
Q:  "If Ghana gets hundreds of millions of tons of e-waste per year, and e-waste is 5.76% of irony scrap (cars, white goods, appliances), and the world generates 106M tons of irony scrap, what percent of the world's e-scrap / e-waste does Ghana receive?"
 A:  If world e-Scrap exports are 5.76% of 106,000,000 metric tons*, then world e-scrap would be 6,105,600 tons per year.   To get hundreds of millions of tons, the rest of the world has to wait for 20 years - disposing of no e-waste - and then dump it all at once on Ghana at the end of two decades.
FACT:   Ghana receives somewhere between 0.000014 and 0.000439 of the world's #ewaste - between four and six /100ths of one percent.
          Calculations below.

after 90% reuseof 570,000,000 tons (include domestic scrap)Of 48,900,000 tons (exported only)
215000215000.000037719298250.0004396728016
8000080000.000014035087720.000163599182


Non toxic copper extraction
So, it's just ludicrous.  If you want a higher percentage, you need a lower denominator.  StEP's higher estimates numerator (215k tons) includes fridges and air conditioners and washer-dryers in "e-waste", which makes for 48.9 million tons per year worldwide.  In which case, for Agbogbloshie to receive hundreds of millions of tons, it would take only 5 years of 100% of all e-waste in every country being dumped there... still ridiculous.

How would China, India, and Nigeria get their share of the "e-waste crisis" if Ghana's Agbogbloshie was being so selfish about it?

*est. based UN University 106,000,000 tons of steel exports (of 570 MT recycled... including domestic use in all nations). ratio on ISRI 76M tons irony scrap + 4.4M segregated e-scrap.