Donald Castillo

  • 812 Presentations

Member since: December 27, 2017

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How Chemicals are Used for C...
Health & Medicine
500 Views 7 years ago pptx
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Driving over the speed limit...
Automotive
436 Views 7 years ago pptx
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Texting while driving is dan...
Lifestyle
469 Views 7 years ago pptx
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Why dogs are the best pets i...
Lifestyle
660 Views 7 years ago pptx
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Wind & Solar energy in Agric...
Environment & Nature
478 Views 7 years ago pptx
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Animal Welfare
Lifestyle
591 Views 1 7 years ago pptx