Guides: energy, barcodes, chemical safety and consumer rights

GHS pictograms: what the 9 hazard symbols actually mean

What each of the nine GHS hazard pictograms means, where to find a product's safety data sheet, and how to read it before you use or store a chemical.

Can you mix bleach with vinegar or ammonia?

Why mixing household bleach with vinegar or ammonia is dangerous, what gas each combination produces, and what to do if it happens by accident.

What is a GTIN, and how do you look one up?

What a GTIN is, how it relates to a UPC or EAN barcode, and how to look one up for free.

What does the Magnuson-Moss Warranty Act protect?

What the Magnuson-Moss Warranty Act covers, and why a sticker saying a warranty is void if you use a third-party repair shop is usually illegal.

Right to repair: what it means and where it applies

What right-to-repair laws actually require manufacturers to do, which U.S. states have passed one, and how the federal Magnuson-Moss Warranty Act fits in.

Is an extended warranty worth it?

What an extended warranty really covers, who sells it, and the math that decides whether it is worth paying for on a specific product.

Warranty vs guarantee: is there a real difference?

The practical difference between a warranty and a guarantee, and why the two words get used almost interchangeably in everyday retail.

Clothing size chart: comparing US, UK and EU sizes

How US, UK and EU clothing sizes line up for women and men, and why the same labeled size still fits differently between brands.