Daily Bulletin

Tear gas and pepper spray are chemical weapons. So, why can police use them?

  • Written by Shireen Daft, Lecturer, Macquarie Law School, Macquarie University
Tear gas and pepper spray are chemical weapons. So, why can police use them?Alex Milan Tracy/Sipa USA

In the ongoing protests over the killing of George Floyd and the broader issue of racial injustice, we have been bombarded with images of demonstrators being hit with tear gas and pepper spray.

In the US state of Ohio, a 22-year-old protester died two days after being exposed to tear gas and pepper spray. Police also used...

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taking a wrecking ball to monuments – contemporary art can ask what really needs tearing down

  • Written by Bronwyn Carlson, Professor, Indigenous Studies, Macquarie University
taking a wrecking ball to monuments – contemporary art can ask what really needs tearing downTony Albert in You Wreck Me (2020). Supplied

As the Black Lives Matter protests raged across the world, I was sent a post on Facebook that read,

Donald J Trump now lives at 1600 Black Lives Matter Plaza, NW, Washington, DC 20500.

The post referred to the mural painted in front of Lafayette Square. In bright yellow paint, the words “Black...

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What makes pepper spray so intense? And is it a tear gas? A chemical engineer explains

  • Written by Gabriel da Silva, Senior Lecturer in Chemical Engineering, University of Melbourne

In recent weeks, the world has looked on as governments use chemical irritants to control protesters and riots. Whether it’s tear gas, pepper spray, mace or pepper balls, all have one thing in common: they’re chemical weapons.

Chemical warfare agents have been used twice in Sydney in the past week alone. Police pepper-sprayed demonstrat...

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  3. The state removal of Māori children from their families is a wound that won't heal – but there is a way forward
  4. 3 things international students want Australians to know
  5. 120 million years ago, giant crocodiles walked on two legs in what is now South Korea
  6. An El Niño hit this banana prawn fishery hard. Here’s what we can learn from their experience
  7. 4 ways a smart government can create jobs and cut emissions
  8. Protests add new element of uncertainty to COVID exit
  9. Was there slavery in Australia? Yes. It shouldn't even be up for debate
  10. employers requisitioned our homes and our time
  11. TV has changed, so must the way we support local content
  12. Ten Twitter accounts you should be following if you want to listen to Indigenous Australians and learn
  13. what the AFL and NRL need to turn sport into show business
  14. Australia needs to confront its history of white privilege to provide a level playing field for all
  15. could bacteria in a capsule protect us from coronavirus and other respiratory infections?
  16. My baby has 'tongue-tie'. Should I be worried?
  17. with 100 days to go, can Jacinda Ardern maintain her extraordinary popularity?
  18. How a stone wedged in a gum tree shows the resilience of Aboriginal culture in Australia
  19. University students aren't cogs in a market. They need more than a narrow focus on 'skills'
  20. At least 1,241 tonnes of microplastics are dumped into Aussie farmland every year from wastewater sludge
  21. how the government shaped a blokey lockdown followed by a blokey recovery
  22. it would help not to pay businesses late)
  23. it's like an ethnic conflict, which offers clues to managing 'road wars'
  24. Heading back to the gym? Here's how to avoid injury after coronavirus isolation
  25. Pat Turner on Closing the Justice Gap
  26. Cutting the ABC cuts public trust, a cost no democracy can afford
  27. Defunding the police could bring positive change in Australia. These communities are showing the way
  28. The national cabinet's in and COAG's out. It's a fresh chance to put health issues on the agenda, but there are risks
  29. Who owns the bones? Human fossils shouldn't just belong to whoever digs them up
  30. Voices, hearts and hands – how the powerful sounds of protest have changed over time
  31. It's 12 months since the last bushfire season began, but don't expect the same this year
  32. By sacking staff and closing stores, big businesses like The Warehouse could hurt their own long-term interests
  33. does your driving speed make any difference to your car's emissions?
  34. If Australia really wants to tackle mental health after coronavirus, we must take action on homelessness
  35. Attending the G7 in the US carries great diplomatic risks for Australia
  36. 'Forced' evictions eat away at a Manila community as developer spares the golf course next door
  37. where you can wear slippers, crack peanuts, and knit 'to your heart's content'
  38. You better hope your work cleaner is one of the few who has time to do a thorough job
  39. bushfires destroyed the writing retreat of an Aussie literary icon
  40. how to protect your kids from in-person sexual abuse
  41. how to protect your kids from online sexual abuse
  42. how would they bring the International Space Station back down to Earth?
  43. racism, COVID-19, and the inequality that fuels these parallel pandemics
  44. Black Lives Matter outrage must drive police reform in Aotearoa-New Zealand too
  45. How Marriage Therapy Help Your Relationships
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