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Pixii: Carbon-neutral construction knowledge platform
As a neutral scientific institution and membership organization, Pixii takes carbon neutrality as a starting point for making the built environment more sustainable, based on passive building principles.
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Clipart Gallery Danger and chemical products: Dangerous and chemical products
OpenOffice.org and LibreOffice can be extended with many extensions. This free extension adds over 400 vector CC cliparts related to security. You can enlarge them without loss of quality.
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App or softwareTeacher