Colin H. Walker Books

Concept science.
Concept science.

By Colin H. Walker

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Move it
Move it

By Colin H. Walker

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How new plants grow
How new plants grow

By Colin H. Walker

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Organic Pollutants
Organic Pollutants

By Colin H. Walker

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Ecotoxicology
Ecotoxicology

By Colin H. Walker

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"During the latter part of the 20th century chemical industry grew rapidly, and with this growth new industrial chemicals found their way into the natural environment. Pesticides came to be used on...

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What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.

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