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Effective Solid Waste Management
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Disposal of Waste Materials - OSHA
Engineering & Construction
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Advanced Diploma in Wastewater Treatment and Recycling
Engineering & Construction
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Advanced Diploma in Principles of Industrial Engineering
Engineering & Construction
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Productivity and Waste Management - Lean and Environmental Perspectives
Engineering & Construction
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Fundamentals of Environmental Engineering
Engineering & Construction
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Advanced Diploma in Environmental Geomechanics
Engineering & Construction
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Introduction to Environmental Geomechanics
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Effective Solid Waste Management
Engineering & Construction
FREE
Start learning
Disposal of Waste Materials - OSHA
Engineering & Construction
FREE
Start learning
Advanced Diploma in Wastewater Treatment and Recycling
Engineering & Construction
FREE
Start learning
Advanced Diploma in Principles of Industrial Engineering
Engineering & Construction
FREE
Start learning
Productivity and Waste Management - Lean and Environmental Perspectives
Engineering & Construction
FREE
Start learning
Fundamentals of Environmental Engineering
Engineering & Construction
FREE
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Advanced Diploma in Environmental Geomechanics
Engineering & Construction
FREE
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Introduction to Environmental Geomechanics
Engineering & Construction
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TL;DR
Duolingo reported Q4 2025 revenue of $282.9 million (+35% YoY), closing its first billion-dollar year, breaking estimates again.
The stock dropped 22.5% anyway. Again.
The company plans to slow down monetization to grow to 100 million DAUs until 2028, by focusing on teaching quality, giving more to free users, and growing non-language courses.
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The Series Finale of Online Education: Coursera Acquires Udemy
Update (April 2026): On April 9, shareholders of both companies voted overwhelmingly to approve the merger — 99.4%% at Coursera, 99.9%% at Udemy. The deal is expected to close in the second half of 2026. I also dug into the 300-page merger prospectus and found that Coursera approached Udemy three times over two years before getting a yes, and that Pluralsight’s owner made a competing cash offer. Read the full merger history.
TL;DR
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