Donald Castillo

  • 812 Presentations

Member since: December 27, 2017

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How Chemicals are Used for C...
Health & Medicine
426 Views 6 years ago pptx
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Driving over the speed limit...
Automotive
387 Views 6 years ago pptx
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Texting while driving is dan...
Lifestyle
429 Views 6 years ago pptx
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Why dogs are the best pets i...
Lifestyle
612 Views 6 years ago pptx
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Wind & Solar energy in Agric...
Environment & Nature
435 Views 6 years ago pptx
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Animal Welfare
Lifestyle
554 Views 1 6 years ago pptx